Asked in Premeth Test 3 — The Cell, Evolution and Enzymes (5 March 2025) 2025

An activated enzyme made of polypeptide chain and a cofactor is?

Correct answer: D. Holoenzyme

  • A. Substrate
  • B. Coenzyme
  • C. Apoenzyme
  • D. Holoenzyme

Explanation

An activated enzyme made of a polypeptide chain and a cofactor is referred to as a "holoenzyme." The holoenzyme is the complete, catalytically active form of an enzyme. The holoenzyme structure ensures that the enzyme is in its active conformation and is capable of facilitating the desired biochemical reactions.

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About Characteristics of Enzymes

Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.

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